# SDR ASAA2017050420638

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 4, 2017
- Submitted: May 8, 2017
- Operation: Air carrier
- Aircraft: [N570AS](https://openairdocs.org/aircraft/N570AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35185
- Aircraft time: 38,796 hours, 11,469 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Warning Light
- Condition: Intermittent
- Location: Apu
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017050420638

## Discrepancy

STARTING APU ON GROUND, RECEIVED A FAULT LIGHT.  ACFT GROUNDED.  PERFORMED FIM 49-40, TASK 802,  NO FLAME SHUTDOWN FAULT ISOLATION. PERFORMED APU START, OPERATIONAL CHECKED OPERATES CORRECTLY, DETERMINED AN INTERMITTENT FAULT.

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